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ORPIMENT (auripigmentum)

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Originally appearing in Volume V20, Page 329 of the 1911 Encyclopedia Britannica.
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ORPIMENT (auripigmentum) , See also:arsenic trisulphide, As2S3, or yellow See also:realgar (q.v.), occurring in small quantities as a See also:mineral crystallizing in the rhombic See also:system and of a brilliant See also:golden-yellow See also:colour in Bohemia, See also:Peru, &c. For See also:industrial purposes an artificial orpiment is manufactured by subliming one See also:part of See also:sulphur with two of arsenic trioxide. The sublimate varies in colour from yellow to red, according to the intimacy of the See also:combination of the ingredients; and by varying the relative quantities used many intermediate tones may be obtained. These artificial preparations are highly poisonous. Formerly, under the name of " See also:king's yellow," a preparation of orpiment was in considerable use as a pigment, but now it has been largely superseded by chrome-yellow. It was also at one See also:time used in See also:dyeing and See also:calico-See also:printing, and for the unhairing of skins, &c.; but safer and equally efficient substitutes have been found.

End of Article: ORPIMENT (auripigmentum)

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